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// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
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package org.apache.doris.nereids.rules.expression;

import org.apache.doris.nereids.CascadesContext;
import org.apache.doris.nereids.trees.expressions.Expression;

import java.util.Optional;

/** ExpressionMatchingContext */
public class ExpressionMatchingContext<E extends Expression> {
    public final E expr;
    public final Optional<Expression> parent;
    public final ExpressionRewriteContext rewriteContext;
    public final CascadesContext cascadesContext;

    public ExpressionMatchingContext(E expr, Expression parent, ExpressionRewriteContext context) {
        this.expr = expr;
        this.parent = Optional.ofNullable(parent);
        this.rewriteContext = context;
        this.cascadesContext = context.cascadesContext;
    }

    public boolean isRoot() {
        return !parent.isPresent();
    }

    public Expression parentOr(Expression defaultParent) {
        return parent.orElse(defaultParent);
    }
}
